title: An amphiphilic pillar[5]arene as efficient and substrate-selective phase-transfer catalyst.
abstract: An amphiphilic macrocyclic compound consisting of 10 tetra-alkyl phosphonium bromide groups and a pillar[5]arene core was prepared. This compound was soluble in both aqueous and organic media and acted as a highly efficient and substrate-selective phase-transfer catalyst. In particular, oxidation of the linear alkene1-hexene to 1-pentanal by KMnO4 was >99%, whereas that of the branched alkene 4-methyl-1-hexene was only 31%, under ideal conditions.
authors.affiliation: Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Japan. ogoshi@se.kanazawa-u.ac.jp
authors.forename: Tomoki
authors.initials: T
authors.lastname: Ogoshi
authors.forename: Naosuke
authors.initials: N
authors.lastname: Ueshima
authors.forename: Tada-aki
authors.initials: TA
authors.lastname: Yamagishi